Register for stoves



WASHBJRN' RGE, orl SENECAy FALLS, NEW YORK.

REGISTER non sTo'vEs.-

specification formingpart of Letters' itea'jlo.v 4,443, eared: Aprii 4, 184e; Reissaed February 19,

. l 1861', No. 13139.

To all whom t may concern Be it known that I, VVASHBURN RAG, of Seneca Falls, in the county of Senecaand StateI of New York, have 'inventedI a' new and improved apparatus for rendering the registers of stoves and other inclosed fireplaces self-acting by the unequal Vcontraction and expansion of different metalsby equal changes of temperature; and I do hereby declare' thatl the following is a full and eX- act description thereof; Y

The apparatus of myy self acting register is intended generally to be attached tothe outside of the stove' but in contact therewith or so near thereto as to be readily affected' by the heat thereof and is constructed as follows: I have a plate of iron (wrought or cast but I prefer cast iron) which I call the sustaining plate, this plate is from one to two feetA in length but for convenience sake as wellr as forv appearance I make this plate in length the equal to the height ofthe stove and at or near theY lower end it is enlarged the widthy so as tol contain and surround the air hole by a bordervor curb. upon which the register rests when closed as hereinafter described, this sustain-V ing plate may be of any width thickness and shape which fancy or convenience may dictate, but the Width of about one and a half inch and thickness of one-fourth of an inch is sufficient. In the back side of the sustaining plate or the side next to the stove is a longitudinal groove (the section of which may berectangular semicircular or any other convenient shape) extending from withinl about a quarter of an inch from the top of the sustaining plate to the upper end of the vertical lever hereinafter mentioned, this groove is from one quarter of an inch to one inch in width and from one quarter to one half an inch in depth. In this groove a slip or rod of brass which I call the expansion rod is suspended by a screw which I call the regulating screw passing through the upper end of the sustaining plate into the groove above mentioned and tapped into the upper end of the brass slip or rod which is here enlarged in thickness for that purpose by riveting thereto a short piece of iron or other metal of suliicient size to receive the screw, the head of the screw or a collar thereon resting upon the top of the sustaining plate. To the lower end of the expansion rod 1s firmly this fulcrum may be a small pin about one' twelfth ofv an inch vin diameter passing through theV vertical lever and through two projecting pieces or ears made fo'r that purpose on the sustaining plate. It will be seen this lever is in eect a lever bent at right angles, the longer end being vertical andthe shorter end horizontal the fulcrum being in the angle. This lever moves backward and forwardv in a slot or mortise made through the sustaining plate. The register is a piece of metal made plane and smooth upon its lower surface and when closed lies at an angle from a vertical sufliciently inclined to cause it to close by its own weight. From thel upper part of the register a tail piece or short lever projects upward and behind the lower end of the vertical lever, in the back side of this tail piece a niche is cut which fits upon an edge formed at the lower end of the slot or mortise in the sustaining plate above mentioned so that the register is sustained by this edge and turns upon it as a fulcrum or centera small projection upon the inner side of the vertical lever at or nea-r its lower end strikes the tail piece about one eighth of an inch above the edge aforesaid so that when the expansion rod is contracted by cooling the vertical lever is caused to press upon the t-ail piece of the register and openrit, and when the eXpansion rod becomes dilated by heat the vertical lever will permit the register to close more or less by its own weight according to the degree of heat to which the expansion rod is subjected. To the screw in the upper end of the sustaining plate is attached an index, under which and attached to the stove or the sustaining plate is a circular indeX plate marked as may be convenient, so that by turning t-he screw the register may be caused to open and close at any desired temperature. In order to render the register more sensitive I sometimes make openings quite through the sustaining plate along the whole or nearly the whole length of the expansion rod thus exposing it to air in the room.

The sustaining plate with the expansion rod, vertical lever and register connected with it as above described, is fastened by screws Vor otherwise in a vertical position to the stove so that the air hole in the sustaining plate shall coincide with a similar one in the stove and it is then ready for use. And I do further declare that I do occasionally dispense with the separate sustain'- ing plate and use the plate forming the stove or a part thereof instead and in such case l prefer placing the expansion rod upon the outside of the stove, it may however be placed inside the stove with or without a separate sustaining plate. And in order more clearly to describe my said invention I have hereunto annexed drawings thereof as follows viz:

Figure I, is a front view of my said apparatus; A, A, is the sustaining plate; B, the expansion rod seen through a longitudinal opening in the sustaining plate; C, the register partly open, showing E, the air hole through which the air passes into the stove; D, the head of the regulating screw; a, a, the index attached to the same screw; b, b, the index plate in section; c, the vertical lever; d, the tail piece of the register.

Fig. II, is a plan of the index and circular index plate.

Fig. III, is a longitudinal section of the whole apparatus above described; A, A, is the sustaining plate; B, the expansion rod which is semicircular in its cross section as shown in Fig. 4f) C, the register partly open;

,D, the regulating screw; a, a., the index attachedio` the same; b, Z), the index plate; c, c, short pieces of iron riveted to the ends of the expansion rod, into the upper one of which the regulating screw is tapped at e; the lower piece of iron is formed into a hook or barb as shown at, i; 7c, is the vertical lever having its fulcrum at, Z; at, 0, the hook attached to the lower end of the expansionrrod falls into the bottom of the niche in the vertical lever; m, is the tail piece of the register projecting upward and behind the lower4 end of the vert-ical lever, a niche being cut therein which sustains the register upon the acute angle, at, n. y

The advantages of my said invention are, as I conceive,\1st, cheapness and simplicity in construction, 2nd certainty and regularity in its action, 3d durability and not being liable to derangement.

Having thus fully described the construcl [FIRST PRINTED 1913.] i 

